Piston.



110.306,16?. PATBNTED DB0. 5, 1905.

D. R. MORRISON. 1 PISTON.

APPL'IoAT-IUN'PILED MAR. 17. 1904.

IINIrnjn srxfrns PATnNr ornrcn. A.

DUDLRYy R; MORRISON, on HARTFORD CITY, INDIANA. PISTQN.

No. 806,167B

Specification of Letters Patent.

Patented Dec. 5, 1905.

Application led March 17, 1904. Serial No. 198,615.

To .all whomV t may concer/'w l Beit known that I, DUDLEY R. MORRISON, a

l citizen of theUnited States, residing at Hartford- City, in the county-. ofBlackford and l State of Indiana, have invented certain new and useful Improvements in Pistons, of which .the following is a specication.'A

This invention relates to improvements in piston constructions for engines in which the pitman from the piston is pivotally connected directly with the latter; and the main objects of the invention are, first, to provide a takeup mechanism at the joint between the pitman and piston, whereby the looseness due to wear can be readily taken up, and, second, to

provide means for a thorough lubrication of the joint.

Other objects and advantages will appear in the description and statement of operation hereinafter contained.

I accomplish the objects of the invention by the mechanism illustrated in the accompanying drawings, in which Flgure 1' 1s a top plan view of my inven- I tion of the wearing parts makes the application of a take-up mechanismimpracticable.

` l represents the walls of the piston. VThis piston is hollow at its outer end, being that end which is shown at the right in Fig. 2, and the chamber thus formed is closed by means` of the removable plate 3. v

2 represents the packing-rings, of usual construction, 'surrounding this end of the piston.

Formed in the opposite end of the pistonis a vertical recess 4, in which the pitman 6 (shown in dotted lines in Fig. 2) is inserted. The side Walls of the recess `4 are provided with rectangular grooves to receive the journalboxes 5 for a pin 8, to which the pitman 6 is attached. The pin 8 is secured in a fixed manner to the pitman and has a rocking'movement in the-boxes 5. These latter are preferably in two parts for convenience in assembling the parts and to enable the boxes to be brought together to take up any looseness due to wear. The walls of the piston 1 have bores extending from their outer surfaces in and communicatingwith the ends ofthe pin 4, and the -top surface of the piston is'provided with the semicircular groove 7 which terminates at the bores extending into the pin 8. The groove `7 conducts the oil or other lubricant in the cylinder down to these bores, whence it enters the boxes and keeps thebearing for the pin 8 thoroughly lubricated. The end of the piston which receives the pitman is bored out in a circular manner for a suitable distance in from the end of the piston to receive the heads of the T-shaped blocks 9, which-are inserted for the purpose of holding the boxes 5 in place. The

stems of the blocks 9 enter the grooves in the walls of the recess 4 and bear against the adjacent half of the bearing-boxes 5. The blocks 9 are secured to the piston by means of the bolts 11, the heads of which bolts project at the end of the piston,where they are of easy access for turning when it becomes necessary to tighten the blocks 9 against the boxes- 5 to take up the wear at said boxes. Topermit of the necessary inward adjustment of the cross-.arms of the block 9 to allow the stem of the block to approach the boxes 5, I provideI the'plates or washers 13, which will preferably be in a plurality of sections to permit one or more of same to be removed, as the necessities require. v

The bores or `holes extending through the walls of the piston to the ends of the pin 8are 4shown in dotted lines in Fig. 3, asalso is the groove 7, passing over the piston and terminating at these pin-holes.

Having thus fully described my invention, whatI claim as new, and wish to secure by Letters Patent, is-

Y 1. An engine-pitmanhaving a fixed pin at its piston end, and a piston having journalboxes at each side of the piston to receive the ends of said pin, means extending to that end of the piston'which the pitman enters, for adj usting said boxes, and bolts having heads projecting from the same piston end for adjusting said means. l

2. A hollow piston approximately twice the length of its diameter divided by a transverse wall into two compartments one of which is closed and in the other of which the pitman is connected, a pitman having a xed pin, twopart journal-boxes mounted in the piston to receive the ends of the pin projecting on each side of the pitman, blocks bearing against the IOO IIO

other box-half and extending to that end of the piston which the pitman enters, and bolts to hold the blocks firmly again'stthe boxes.

3. A piston having a longitudinal vend recess, a pitman entering said recess, a pin iixed in the inserted end of the pitrnan, two-part journal-boxes mounted in the piston to lreceive the ends of the pin, which project on each side of the pitman, blocks bearing against the outer box-half and extending to that end of the piston which the pitman enters, spacing-plates between the blocks and the piston to regulate the adjustment of the block longitudinally of the piston, and bolts to hold the block firmly against the boxes.

4. A hollow piston, a pitman having a fixed Witnesses:

JOSEPH A. MINTURN, S. MAHLON UNGER. 

